Seashell

The Seashell is a material. The game describes it as "A shell of the rare and dangerous combusting mollusk. Frequently traded by maidens near the ocean."

Robes
Description: When taking damage, you explode, dealing damage to nearby enemies.

By default, the explosion range is 3.5 magicmeters. This value is rounded down in UIs.

Spells
Description: Splits into multiple projectiles after some time.

The projectile always splits after 0.75 seconds regardless of material count and grade, in a similar manner to the Illusion Dust material. When the parent projectile spilts, the split projectiles' lifetimes will be reset to 1 second, effectively increasing the spell's range by 75%.

Damage and Spellpower cannot be below 1 and 0 respectively regardless of material count and grade.